Np Behavior in Synthesized Uranyl Phases: Results of Initial Tests

Friese, Judah I. ; Douglas, Matthew ; McNamara, Bruce K. ; Clark, Sue B. ; Hanson, Brady D.

Pacific Northwest National Laboratory (U.S.)

关键词: Schoepite;    Sorbtion;    Uranophane;    Sodium;    Neptunium;   

DOI  :  10.2172/860092
RP-ID  :  PNNL-14856
RP-ID  :  AC05-76RL01830
RP-ID  :  860092

美国|英语

来源: UNT Digital Library

【 摘 要 】

Initial tests were completed at Pacific Northwest National Laboratory for developing a potential mechanism to retard the mobility of neptunium at the Yucca Mountain repository. Neptunium is of concern because of its mobility in the environment and long half life, contributing a large percentage of the potential dose over extended times at the perimeter of the site. The mobility of neptunium could be retarded by associating with uranium mineral phases. The following four uranium mineral phases were examined and are potential secondary phases expected to form as a result of interactions of spent nuclear fuel with the local environment: meta-schoepite, studtite, uranophane, and sodium boltwoodite. The fate of the neptunium was examined in these synthetic experiments.